[leza wang]

i have big old windows, i was cleaing/removing the edges so i can
caulk these edges. now i see scratches in my windows starting from the
buttom and go up not not to the middle of the window (lower). there
are for othem (like thread). i am not sure what happend, can this
something to fix before it become crack or it would be a crack. it is
one layer glass. i was hoping to use some clue or something to stop
this threads from spreading. thanks a lot

[Rose[_5_]]

On Feb 14, 7:12*pm, leza wang wrote:
i have big old windows, i was cleaing/removing the edges so i can
caulk these edges. now i see scratches in my windows starting from the
buttom and go up not not to the middle of the window (lower). there
are for othem (like thread). i am not sure what happend, can this
something to fix before it become crack or it would be a crack. it is
one layer glass. i was hoping to use some clue or something to stop
this threads from spreading. thanks a lot

It could be a crack.

[Steve B[_10_]]

"leza wang" wrote in message
...
i have big old windows, i was cleaing/removing the edges so i can
caulk these edges. now i see scratches in my windows starting from the
buttom and go up not not to the middle of the window (lower). there
are for othem (like thread). i am not sure what happend, can this
something to fix before it become crack or it would be a crack. it is
one layer glass. i was hoping to use some clue or something to stop
this threads from spreading. thanks a lot

It's the glass. Glass will actually flow with age. It's just getting old.

Steve

Heart surgery pending?
Read up and prepare.
Download the book $10
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[RicodJour]

On Feb 14, 9:30*pm, "Steve B" wrote:
"leza wang" wrote in message

i have big old windows, i was cleaing/removing the edges so i can
caulk these edges. now i see scratches in my windows starting from the
buttom and go up not not to the middle of the window (lower). there
are for othem (like thread). i am not sure what happend, can this
something to fix before it become crack or it would be a crack. it is
one layer glass. i was hoping to use some clue or something to stop
this threads from spreading. thanks a lot

If they are cracks, you will see the thickness of the glass in the
crack, and the cracks will continue to grow. Time and temperature
will do it.

It's the glass. *Glass will actually flow with age. *It's just getting old.

That's a myth and has been disproved. Probably started by a high
school teacher with a faulty grasp, and an overactive imagination,
about what 'super-cooled liquid' actually means. There's glass from
the time of the Egyptians (pyramid variety) and there's no thickening
at the bottom from flow.

R

[Frank[_13_]]

On 2/15/2011 11:40 AM, RicodJour wrote:
On Feb 14, 9:30 pm, "Steve wrote:
"leza wrote in message

i have big old windows, i was cleaing/removing the edges so i can
caulk these edges. now i see scratches in my windows starting from the
buttom and go up not not to the middle of the window (lower). there
are for othem (like thread). i am not sure what happend, can this
something to fix before it become crack or it would be a crack. it is
one layer glass. i was hoping to use some clue or something to stop
this threads from spreading. thanks a lot

If they are cracks, you will see the thickness of the glass in the
crack, and the cracks will continue to grow. Time and temperature
will do it.

It's the glass. Glass will actually flow with age. It's just getting old.

That's a myth and has been disproved. Probably started by a high
school teacher with a faulty grasp, and an overactive imagination,
about what 'super-cooled liquid' actually means. There's glass from
the time of the Egyptians (pyramid variety) and there's no thickening
at the bottom from flow.

R
What I read was they originally thought that old glass windows had
flowed because they were thicker at bottom but current thinking is that
glass at the time was uneven and they just put thicker stuff at the bottom.

As for op, I wondered if scratches were just old razor blade scratches
from removing paint.

[RicodJour]

On Feb 15, 12:59*pm, Frank wrote:
On 2/15/2011 11:40 AM, RicodJour wrote:
On Feb 14, 9:30 pm, "Steve *wrote:
"leza *wrote in message

i have big old windows, i was cleaing/removing the edges so i can
caulk these edges. now i see scratches in my windows starting from the
buttom and go up not not to the middle of the window (lower). there
are for othem (like thread). i am not sure what happend, can this
something to fix before it become crack or it would be a crack. it is
one layer glass. i was hoping to use some clue or something to stop
this threads from spreading. thanks a lot

If they are cracks, you will see the thickness of the glass in the
crack, and the cracks will continue to grow. *Time and temperature
will do it.

It's the glass. *Glass will actually flow with age. *It's just getting old.

That's a myth and has been disproved. *Probably started by a high
school teacher with a faulty grasp, and an overactive imagination,
about what 'super-cooled liquid' actually means. *There's glass from
the time of the Egyptians (pyramid variety) and there's no thickening
at the bottom from flow.


What I read was they originally thought that old glass windows had
flowed because they were thicker at bottom but current thinking is that
glass at the time was uneven and they just put thicker stuff at the bottom.

Yep, you guessed it. That's still considered good practice today.

As for op, I wondered if scratches were just old razor blade scratches
from removing paint.

Very possibly. That's the reason I pointed out a way to differentiate
between cracks and scratches, but a deep enough scratch might as well
be a crack.

R

[Tony Miklos[_2_]]

On 2/15/2011 1:47 PM, RicodJour wrote:
On Feb 15, 12:59 pm, wrote:
On 2/15/2011 11:40 AM, RicodJour wrote:
On Feb 14, 9:30 pm, "Steve wrote:
"leza wrote in message

i have big old windows, i was cleaing/removing the edges so i can
caulk these edges. now i see scratches in my windows starting from the
buttom and go up not not to the middle of the window (lower). there
are for othem (like thread). i am not sure what happend, can this
something to fix before it become crack or it would be a crack. it is
one layer glass. i was hoping to use some clue or something to stop
this threads from spreading. thanks a lot

If they are cracks, you will see the thickness of the glass in the
crack, and the cracks will continue to grow. Time and temperature
will do it.

It's the glass. Glass will actually flow with age. It's just getting old.

That's a myth and has been disproved. Probably started by a high
school teacher with a faulty grasp, and an overactive imagination,
about what 'super-cooled liquid' actually means. There's glass from
the time of the Egyptians (pyramid variety) and there's no thickening
at the bottom from flow.


What I read was they originally thought that old glass windows had
flowed because they were thicker at bottom but current thinking is that
glass at the time was uneven and they just put thicker stuff at the bottom.

Yep, you guessed it. That's still considered good practice today.

As for op, I wondered if scratches were just old razor blade scratches
from removing paint.

Very possibly. That's the reason I pointed out a way to differentiate
between cracks and scratches, but a deep enough scratch might as well
be a crack.

R

Lost the op original post but wanted to say that super glue works well
in some glass cracks. The mirror mounted on the wall in the bathroom
cracked when I tried to push it into place. The crack was weird, I
could push on it a certain direction and it would show, push on the
other half and the line would disappear. I put super glue in the crack
and pushed on it for a minute. Cleaned off the super glue and the crack
can not be seen. It's been years, maybe 3 or 4.